How can custom optics save money?

Catalog optics companies, include substantial price market ups for all their lenses. In many cases this can be 2-3 times what the price of a custom lens would be. At what volume these savings can be found depends on the lens type, for a glass spherical lens you could be saving money 40% in volumes as low as 50 units, for a molded optic it might be thousands of units before the price of the tool will justify pursuing a custom solution.